Because of their experience, I was able to get parts of the work covered under code upgrades for things that I did not build back exactly as they were before the claim (e.g. moving plumbing to expand a bathroom).At the end of the day, no one is going to care more about your property than you.

Without the sprinkler permit you can't pull an underground plumbing nor interior plumbing permit and if you're amending the plans that could hold up both of those permits, which could stop your build in its tracks, depending on when the mistake is caught. 

Hey @Devin Bost, I would highly recommend a few things to help with this. 1) Have systems and processes lined out for any emergency you can think of.2) A spreadsheet of subcontractors/ vendors that could handle the situation that arises (plumbing leak, electric out somewhere, etc.)3) Your cleaning team and handy person should be utilized for some things.4) Something like Breezeway can give you 24/7 support around your property with a dedicated phone number line.

The only things you need are the dimensions, photos of the plumbing, and a budget.

We did use a high-grade vinyl plank flooring over the concrete floor down there, just in case, but years later we can say there have been no more water issues.We also plumbed in and installed a laundry room, purchasing twin pairs of coin-op Speed Queens.All of those renovations allowed us to go up-market a bit, from the prior $160/week to $180/week within the first few weeks on the incremental rehabbed units.

I had to redo the bathrooms as well and dealing with old crappy plumbing was not fun.

They installed bidets without my permission and created plumbing issues so I had to pay for a plumber to come out several times, I've had to replace a frontdoor knob and deadbolt last month even after we rekeyed the home prior to them moving in, the garbage disposal blades were jammed so had to call a handyman, repaired a broken window which my property manager claims was broken prior to them moving in even though the repair was made 3 months after they moved in.

And can I get away with only getting permits on new electric & moving plumbing, but demo,  erect walls myself and things like that?

One great example is framing crew comes in....frames up the house, plumbing and electrical crew comes in and does their thing....leaves all their 1/2 finished cokes, Gatorade and beer cans and 1/2 eaten lunches sitting on the framing.   

I run my own small pressure washing/handyman business on the side while I was working full time over the summer doing plumbing and electrical.